@mixin my_gradient ($leftColor, $rightColor){
  background: linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.5) 150px,rgba(255, 255, 255, 1) 400px), linear-gradient(90deg , $leftColor 0%, $rightColor 100%);
}